Clinical Application of Radiolabeled RGD Peptides for PET Imaging of Integrin αvβ3
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Updated: Mar 28, 2026
Preparing a 68Ga-labeled Arginine Glycine Aspartate RGD-peptide for Angiogenesis
Published on: January 7, 2019
Haojun Chen1, Gang Niu2, Hua Wu3
11. Department of Nuclear Medicine, Xiamen Cancer Center, the First Affiliated Hospital of Xiamen University, Xiamen, China ; 2. Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland.
Abstract:
Molecular imaging for non-invasive assessment of angiogenesisis is of great interest for clinicians because of the wide-spread application of anti-angiogenic cancer therapeutics. Besides, many other interventions that involve the change of blood vessel/tumor microenvironment would also benefit from such imaging strategies. Of the imaging techniques that target angiogenesis, radiolabeled Arg-Gly-Asp (RGD) peptides have been a major focus because of their high affinity and selectivity for integrin αvβ3--one of the most extensively examined target of angiogenesis. Since the level of integrin αvβ3 expression has been established as a surrogate marker of angiogenic activity, imaging αvβ3 expression can potentially be used as an early indicator of effectiveness of antiangiogenic therapy at the molecular level. In this review, we summarize RGD-based PET tracers that have already been used in clinical trials and intercompared them in terms of radiosynthesis, dosimetry, pharmacokinetics and clinical applications. A perspective of their future use in the clinic is also provided.
Insights
Radiolabeled Arg-Gly-Asp (RGD) peptides are crucial for molecular imaging of angiogenesis, enabling non-invasive assessment of anti-angiogenic therapy effectiveness. This review compares RGD-based PET tracers used in clinical trials for their potential in cancer treatment monitoring.
Area of Science:
- Molecular Imaging
- Oncology
- Radiochemistry
Background:
- Non-invasive assessment of angiogenesis is critical for evaluating anti-angiogenic cancer therapies.
- Integrin αvβ3 is a key target for imaging angiogenesis due to its role as a surrogate marker of angiogenic activity.
- Radiolabeled Arg-Gly-Asp (RGD) peptides offer high affinity and selectivity for integrin αvβ3.
Purpose of the Study:
- To review RGD-based Positron Emission Tomography (PET) tracers utilized in clinical trials for angiogenesis imaging.
- To compare these tracers based on radiosynthesis, dosimetry, pharmacokinetics, and clinical applications.
- To provide a perspective on the future clinical utility of RGD-based PET tracers in monitoring anti-angiogenic therapy.
Main Methods:
- Literature review of RGD-based PET tracers employed in clinical studies.
- Comparative analysis of tracer characteristics including radiosynthesis, dosimetry, and pharmacokinetics.
- Evaluation of clinical applications and outcomes associated with RGD-based PET imaging.
Main Results:
- Several RGD-based PET tracers have been successfully used in clinical trials for imaging integrin αvβ3 expression.
- Intercomparison reveals variations in radiosynthesis efficiency, pharmacokinetic profiles, and radiation dosimetry among tracers.
- Clinical applications demonstrate the potential of these tracers in assessing anti-angiogenic therapy response at the molecular level.
Conclusions:
- RGD-based PET tracers are valuable tools for non-invasive molecular imaging of angiogenesis and monitoring therapeutic interventions.
- Further optimization of tracer design and clinical validation is necessary to enhance their role in personalized cancer therapy.
- These imaging strategies hold promise for early detection of treatment efficacy and guiding clinical decision-making.
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